Transcript for Candidates' Changing Fortunes
I want to bring in our senior washington editor rick klein tonight. Let's take another look at that gallup poll we showed. A tighter race already. We know it reflect s a rolling average as we know and still reflects voters asked before the debate and still could be on the move and all eyes on the crucial battleground states. In colorado where the debate was held, university of denver poll showing the president holding on to his lead in colorado and, rick, both are watching the battlegrounds closely over the next week. Those are the poll s stage. Nothing dramatic yet. It looks like it shook the race but didn't upend it so still talking about a slight edge for president obama. You talk about mr. Romney's debate performance. We know the vice presidential debate is this week and there had been memorable moments before. We remember this from four years ago. Nice to meet you. Hey, can I call you joe? You can call me joe. Can I call you joe. That was sarah palin holding her own against joe biden and this memorable moment from the 19 8 debate. Vice presidential candidate lloyd bentsen saying this to dan quayle as he said he had as much quayle after quayle said he had as much experience as jfk. Jack kennedy was a friend of mine. Senator, you're no jack kennedy. Two very memorable lines butted made an interesting observation. They are quite famous but both were uttered by losing candidates. Paul ryan and joe biden know the stakes are huge for this debate. This is brand-new terrain for ryan. Biden has more pressure on him than last week after the man at the top of the ticket did not deliver. Rick klein with the bigger picture, thank you. Reminder right leer "one on one, the candidates debate" on thursday night, diane and george right at the desk. Jake tacher and me at the debate hall and abc's martha raddatz will be moderating the debate at 9:00 p.M. Eastern right here on abc.
This transcript has been automatically generated and may not be 100% accurate.